Dewey Decimal Classification (DDC)

0 - Generalities (67): 00 - Knowledge, the book, computers, programming, Internet (28); 01 - Bibliography (13); 02 - Library and information sciences (28); 03 - General encyclopedic works (1); 05 - General serials & their indexes (0); 06 - General organizations & museology (1); 07 - News media, journalism, publishing (6); 08 - General collections (1); 09 - Manuscripts & rare books (1)

1 - Philosophy & psychology (17): 10 - Philosophy & psychology (15); 11 - Metaphysics (0); 12 - Epistemology, causation, humankind (0); 13 - Paranormal phenomena (0); 14 - Specific philosophical schools (0); 15 - Psychology (1); 16 - Logic (0); 17 - Ethics (Moral philosophy) (0); 18 - Ancient, Medieval, Oriental philosophy (0); 19 - Modern Western philosophy (1)

2 - Religion (44): 20 - Religion (5); 21 - Philosophy & theory of religion (1); 22 - Bible (2); 23 - Christianity, Christian theology (0); 24 - Christian moral & devotional theology (2); 25 - Christian orders & local church (0); 26 - Social & ecclesiastical theology (0); 27 - History of Christianity & Christian church (34); 28 - Christian denominations & sects (0); 29 - Other & comparative religions (0)

3 - Social sciences (110): 30 - Social sciences (6); 31 - General statistics (0); 32 - Political science (30); 33 - Economics (37); 34 - Law (14); 35 - Public administration & military science (6); 36 - Social problems & services, associations (1); 37 - Education (8); 38 - Commerce, communications, transport (0); 39 - Customs, etiquette, folklore (8)

4 - Language (15): 40 - Language (11); 41 - Linguistics (3); 42 - English & Old English (0); 43 - Germanic languages, German (1); 44 - Romance languages, French (0); 45 - Italian, Romanian, Rhaeto-Romanic (0); 46 - Spanish & Portuguese languages (0); 47 - Italic, Latin (0); 48 - Hellenic languages, Classical Greek (0); 49 - Other languages (0)

5 - Natural sciences & mathematics (99): 50 - Natural sciences & mathematics (7); 51 - Mathematics (16); 52 - Astronomy & allied sciences (3); 53 - Physics (10); 54 - Chemistry & allied sciences (14); 55 - Earth sciences (17); 56 - Paleontology, Paleozoology (0); 57 - Life sciences, Biology (20); 58 - Plants (8); 59 - Animals (4)

6 - Technology (Applied sciences) (261): 60 - Technology (Applied sciences) (6); 61 - Medical sciences, Medicine (148); 62 - Engineering & allied operations (23); 63 - Agriculture & related technologies (58); 64 - Home economics & family living (0); 65 - Management & auxiliary services (4); 66 - Chemical engineering (16); 67 - Manufacturing (3); 68 - Manufacture for specific uses (1); 69 - Buildings (2)

7 - The arts, Fine & decorative arts (28): 70 - The arts, Fine & decorative arts (3); 71 - Civic & landscape art (0); 72 - Architecture (6); 73 - Plastic arts, Sculpture (2); 74 - Drawing & decorative arts (1); 75 - Painting & paintings (2); 76 - Graphic arts, Printmaking and prints (1); 77 - Photography & photographs (2); 78 - Music (8); 79 - Recreational & performance arts (3)

8 - Literature (263): 80 - Literature & rhetoric (252); 81 - American literature in English (3); 82 - English & Old English literatures (3); 83 - Literatures of Gemanic languages, German literature (0); 84 - Literature of Romance languages, French literature (1); 85 - Italian, Romanian, Rhaeto-Romanic literatures (0); 86 - Spanish & Portuguese literature (0); 87 - Italic literatures, Latin (0); 88 - Hellenic literatures, Classical Greek (2); 89 - Literatures of other languages (2)

9 - Geography & history (103): 90 - Geography & history (81); 91 - Georgaphy & travel (0); 92 - Biography, geneology, insignia (12); 93 - History of ancient world (0); 94 - General history of Europe (9); 95 - General history of Asia, Far East (1); 96 - General history of Africa (0); 97 - General history of North America (0); 98 - General history of South America (0); 99 - General history of other areas (0)